/// <summary>
/// Creates a new <see cref="V1Service"/> for the specified <see cref="Resources.Channel"/>
/// </summary>
/// <param name="channel">The <see cref="Resources.Channel"/> to deploy</param>
/// <returns>A new awaitable <see cref="Task"/></returns>
protected virtual async Task CreateChannelServiceAsync(Resources.Channel channel)
{
V1Service service;
try
{
this.Logger.LogInformation("Creating a new service for the channel with name '{resourceName}'...", channel.Name());
V1ObjectMeta serviceMetadata = new V1ObjectMeta();
serviceMetadata.Name = channel.Name();
serviceMetadata.NamespaceProperty = channel.Namespace();
serviceMetadata.Labels = new Dictionary <string, string>()
{
{ "app", channel.Name() },
{ "type", "channel" }
};
V1ServiceSpec serviceSpec = new V1ServiceSpec();
serviceSpec.Ports = new List <V1ServicePort>()
{
new V1ServicePort(80, name: "http")
};
serviceSpec.Selector = new Dictionary <string, string>()
{
{ "app", channel.Name() }
};
service = new V1Service(KubernetesDefaults.ApiVersions.V1, KubernetesDefaults.Kinds.Service, serviceMetadata, serviceSpec);
await this.KubernetesClient.CreateNamespacedServiceAsync(service, channel.Namespace());
this.Logger.LogInformation("A new service for the channel with name '{resourceName}' has been successfully created.", channel.Name());
}
catch (HttpOperationException ex)
{
this.Logger.LogError($"An error occured while creating the service for the channel with name '{{resourceName}}': the server responded with a non-success status code '{{statusCode}}'.{Environment.NewLine}Details: {{responseContent}}", channel.Name(), ex.Response.StatusCode, ex.Response.Content);
throw;
}
}
/// <summary>
/// Handles a <see cref="Resources.Channel"/> event
/// </summary>
/// <param name="e">The type of event to handle</param>
/// <param name="channel">The <see cref="Resources.Channel"/> the event to handle applies to</param>
protected virtual async void OnChannelEvent(WatchEventType e, Resources.Channel channel)
{
this.Logger.LogInformation("A new event of type '{watchEventType}' concerning the CRD of kind '{crdKind}' with name '{crdName}' has been received.", e, channel.Kind, channel.Name());
switch (e)
{
case WatchEventType.Added:
await this.DeployChannelAsync(channel);
break;
case WatchEventType.Modified:
break;
case WatchEventType.Deleted:
await this.DeleteChannelAsync(channel);
break;
case WatchEventType.Bookmark:
break;
case WatchEventType.Error:
break;
default:
throw new NotSupportedException($"The specified watch event type '{e}' is not supported");
}
}
/// <summary>
/// Deletes an existing <see cref="Resources.Channel"/>
/// </summary>
/// <param name="channel">The <see cref="Resources.Channel"/> to delete</param>
/// <returns>A new awaitable <see cref="Task"/></returns>
protected virtual async Task DeleteChannelAsync(Resources.Channel channel)
{
try
{
this.UnregisterChannel(channel);
await this.DeleteChannelServiceAsync(channel);
await this.DeleteChannelDeploymentAsync(channel);
}
catch
{
}
}
/// <summary>
/// Creates a new <see cref="V1Deployment"/> for the specified <see cref="Resources.Channel"/>
/// </summary>
/// <param name="channel">The <see cref="Resources.Channel"/> to deploy</param>
/// <returns>A new awaitable <see cref="Task"/></returns>
protected virtual async Task CreateChannelDeploymentAsync(Resources.Channel channel)
{
V1Deployment deployment;
try
{
this.Logger.LogInformation("Creating a new deployment for the channel with name '{resourceName}'...", channel.Name());
V1PodSpec podSpec = new V1PodSpec();
V1Container container = channel.Spec.Container;
container.Env.Add(new V1EnvVar("SINK", $"http://gateway.{channel.Namespace()}.svc.cluster.local/events/"));
podSpec.Containers = new List <V1Container>()
{
container
};
V1ObjectMeta podMetadata = new V1ObjectMeta();
podMetadata.Annotations = new Dictionary <string, string>()
{
{ "sidecar.istio.io/inject", "true" }
};
V1PodTemplateSpec podTemplateSpec = new V1PodTemplateSpec(podMetadata, podSpec);
podTemplateSpec.Metadata.Labels = new Dictionary <string, string>()
{
{ "app", channel.Name() },
{ "version", "1.0" }
};
V1DeploymentSpec deploymentSpec = new V1DeploymentSpec(new V1LabelSelector(), podTemplateSpec);
deploymentSpec.Selector.MatchLabels = new Dictionary <string, string>()
{
{ "app", channel.Name() },
{ "version", "1.0" }
};
V1ObjectMeta deploymentMetadata = new V1ObjectMeta(namespaceProperty: channel.Namespace(), name: channel.Name());
deploymentMetadata.Labels = new Dictionary <string, string>()
{
{ "type", EventingDefaults.Labels.Channel }
};
deploymentMetadata.Name = channel.Name();
deploymentMetadata.NamespaceProperty = channel.Namespace();
deployment = new V1Deployment(KubernetesDefaults.ApiVersions.AppsV1, KubernetesDefaults.Kinds.Deployment, deploymentMetadata, deploymentSpec);
await this.KubernetesClient.CreateNamespacedDeploymentAsync(deployment, channel.Namespace());
this.Logger.LogInformation("A new deployment for the channel with name '{resourceName}' has been successfully created.", channel.Name());
}
catch (HttpOperationException ex)
{
this.Logger.LogError($"An error occured while creating the deployment for the channel with name '{{resourceName}}': the server responded with a non-success status code '{{statusCode}}'.{Environment.NewLine}Details: {{responseContent}}", channel.Name(), ex.Response.StatusCode, ex.Response.Content);
throw;
}
}
/// <summary>
/// Deletes the <see cref="V1Deployment"/> for the specified <see cref="Resources.Channel"/>
/// </summary>
/// <param name="channel">The <see cref="Resources.Channel"/> to delete</param>
/// <returns>A new awaitable <see cref="Task"/></returns>
protected virtual async Task DeleteChannelDeploymentAsync(Resources.Channel channel)
{
try
{
this.Logger.LogInformation("Deleting the deployment for the channel with name '{resourceName}'...", channel.Name());
await this.KubernetesClient.DeleteNamespacedDeploymentAsync(channel.Name(), channel.Namespace());
this.Logger.LogInformation("The deployment for the channel with name '{resourceName}' has been successfully deleted.", channel.Name());
}
catch (HttpOperationException ex)
{
this.Logger.LogError($"An error occured while deleting the deployment for the channel with name '{{resourceName}}': the server responded with a non-success status code '{{statusCode}}'.{Environment.NewLine}Details: {{responseContent}}", channel.Name(), ex.Response.StatusCode, ex.Response.Content);
throw;
}
}
/// <summary>
/// Unregisters the specified <see cref="Resources.Channel"/>
/// </summary>
/// <param name="channel">The <see cref="Resources.Channel"/> to unregister</param>
protected virtual void UnregisterChannel(Resources.Channel channel)
{
this.ChannelManager.UnregisterChannel(channel.Name());
}
/// <summary>
/// Registers the specified <see cref="Resources.Channel"/>
/// </summary>
/// <param name="channel">The <see cref="Resources.Channel"/> to register</param>
protected virtual void RegisterChannel(Resources.Channel channel)
{
this.ChannelManager.RegisterChannel(channel.Name(), new Uri($"http://{channel.Name()}/events/"));
}
